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Pests of jatropha
By
Dr. U. Pirithiraj, P.hD.
Assistant Professor (Entomology)
JSACAT
Affiliated to Tamil Nadu Agricultural University
Leaf webber, Pempelia morosalis, Pyralidae,
Lepidoptera
1
Dr. U. Pirithiraj, P.hD. (Entomology)
Nature/symptoms of damage
Damage to the leaves, inflorescence,
fruits and apical stem of the Jatropha
plant by making webs along with excreta
First instar larvae are tiny
Eggs are white pale
Adults are grey
This specie is known to occur in Asia
Scutellerid bug, Scutellera nobilis, Chrysocoris
purpureaus, Scutellaridae, Hemiptera
2
Dr. U. Pirithiraj, P.hD. (Entomology)
Scutellera nobilis
Chrysocoris purpureaus
Has a brilliant metallic coloration and a greatly enlarged scutellum
which forms a continuous shield
Nymph and adult suck the sap
Distributed in northern India
Eggs are laid in a characteristic
pattern in two longitudinal rows,
usually 47 - 52 eggs
Dr. U. Pirithiraj, P.hD. (Entomology)
Thrips, Retithrips syriacus, Thripidae, Thysanoptera
3
Dr. U. Pirithiraj, P.hD. (Entomology)
Nymphs carries fecal matters
Damages the leaves
Widespread in Africa and India
Red spider mite, Tetranychus urticae, Tetranichidae,
Acarina
4
Dr. U. Pirithiraj, P.hD. (Entomology)
Mites found on the underside of the leaves
Affected leaves become yellow, silvery or bronze and distorted.
Dicofol 18.5 EC @ 2 ml/l
T. urticae occurs in most parts of the world. It has been recorded from most countries in Europe, Asia, Africa,
Australasia, the Pacific and Caribbean islands, North, Central and South America.
Mealy bug, Ferrisia virgata, Pseudococcidae,
Hemiptera
5
Dr. U. Pirithiraj, P.hD. (Entomology)
Sucks the sap from leaves and stems, sometimes from fruits if heavily infested
and causes crinkling leaves, dry stems
A widely distributed and polyphagous pest species
Scales, Pulvinaria maxima, Coccidae, Hemiptera
6
Dr. U. Pirithiraj, P.hD. (Entomology)
Scales are found on twigs, shoots and leaves
The Oriental Region ( India, Indonesia, Philippines, Sri Lanka, Taiwan, Thailand
and Vietnam
Ash weevil, Myllocerus spp., Curculionidae,
Coleoptera
7
Dr. U. Pirithiraj, P.hD. (Entomology)
Notching symptom in leaves
Flower beetle, Oxycetonia versicolor,
Cetonidae,Coleoptera
8
Dr. U. Pirithiraj, P.hD. (Entomology)
The beetles feed on buds and flower
Result in irregular feeding marks.

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Pests of jatropha_Bionomics_identification_Dr.UPR.pdf

  • 1. Pests of jatropha By Dr. U. Pirithiraj, P.hD. Assistant Professor (Entomology) JSACAT Affiliated to Tamil Nadu Agricultural University
  • 2. Leaf webber, Pempelia morosalis, Pyralidae, Lepidoptera 1 Dr. U. Pirithiraj, P.hD. (Entomology) Nature/symptoms of damage Damage to the leaves, inflorescence, fruits and apical stem of the Jatropha plant by making webs along with excreta First instar larvae are tiny Eggs are white pale Adults are grey This specie is known to occur in Asia
  • 3. Scutellerid bug, Scutellera nobilis, Chrysocoris purpureaus, Scutellaridae, Hemiptera 2 Dr. U. Pirithiraj, P.hD. (Entomology) Scutellera nobilis Chrysocoris purpureaus Has a brilliant metallic coloration and a greatly enlarged scutellum which forms a continuous shield Nymph and adult suck the sap Distributed in northern India
  • 4. Eggs are laid in a characteristic pattern in two longitudinal rows, usually 47 - 52 eggs Dr. U. Pirithiraj, P.hD. (Entomology)
  • 5. Thrips, Retithrips syriacus, Thripidae, Thysanoptera 3 Dr. U. Pirithiraj, P.hD. (Entomology) Nymphs carries fecal matters Damages the leaves Widespread in Africa and India
  • 6. Red spider mite, Tetranychus urticae, Tetranichidae, Acarina 4 Dr. U. Pirithiraj, P.hD. (Entomology) Mites found on the underside of the leaves Affected leaves become yellow, silvery or bronze and distorted. Dicofol 18.5 EC @ 2 ml/l T. urticae occurs in most parts of the world. It has been recorded from most countries in Europe, Asia, Africa, Australasia, the Pacific and Caribbean islands, North, Central and South America.
  • 7. Mealy bug, Ferrisia virgata, Pseudococcidae, Hemiptera 5 Dr. U. Pirithiraj, P.hD. (Entomology) Sucks the sap from leaves and stems, sometimes from fruits if heavily infested and causes crinkling leaves, dry stems A widely distributed and polyphagous pest species
  • 8. Scales, Pulvinaria maxima, Coccidae, Hemiptera 6 Dr. U. Pirithiraj, P.hD. (Entomology) Scales are found on twigs, shoots and leaves The Oriental Region ( India, Indonesia, Philippines, Sri Lanka, Taiwan, Thailand and Vietnam
  • 9. Ash weevil, Myllocerus spp., Curculionidae, Coleoptera 7 Dr. U. Pirithiraj, P.hD. (Entomology) Notching symptom in leaves
  • 10. Flower beetle, Oxycetonia versicolor, Cetonidae,Coleoptera 8 Dr. U. Pirithiraj, P.hD. (Entomology) The beetles feed on buds and flower Result in irregular feeding marks.